[kuschku]

People often do code on Whiteboards – but not actual code, but diagrams, plans, etc.

[catnaroek]

Sometimes actual code too. For instance, if I'm designing an optimization pass for a compiler, I'll write toy IR programs and show how the optimization pass will rewrite them. And I'll do it on a whiteboard.

[kuschku]

Yup. But the thing I meant is that you illustrate things, not actually code your application code.